Systems and methods use behavioral data to assess listings for items. The behavior data may relate to information regarding user actions in connection with listings for the items. The listings may be collections of information about the items. Behavioral data in connection with a collection of listings is used to assess how changing listings affects one or more performance measures and/or to score listing quality. The assessment may be used for various purposes, such as identifying listings that may be changed to achieve one or more improved performance measures for corresponding items and for other applications.